Im a beta tester for this product and it does use Chromium under the hood, pre-bundled with uBlock no less.

Well then it doesn't seem so groundbreaking then

i'd have liked to be a fly on the wall when they pitched this to the investors

I would like to read more about this. Do you have links?

Seeing as its a closed beta, I don't really have any links to any reading material on the app - However here are some screenshots however showing the Chromium pages within Arc Browser and some of the supporting files within the app bundle. https://imgur.com/a/DXE1x0m

Thanks for the snapshots and info.